The cause of super wrinkle sleeve when bending elbow

[kajuman]

Dear fellow tailors and senior tailors,
There's something that i'm so curious about.

So I notice that some suits sleeve are very neat when even when you bend your elbow, picture for reference:







However when I make for my customer, even though it's quite neat when the customer stand straight, but when the customer move the arm or bend the sleeve, the wrinkle is so severe. What causes these problem?







Thank you so much for the help.